Formula unit

A formula bit in chemistry is a empirical formula of all ionic or covalent network solid compound used as an self-employed adult entity for stoichiometric calculations. it is the lowest whole number ratio of ions represented in an ionic compound. Examples put ionic NaCl & K₂O and covalent networks such as SiO₂ and C as diamond or graphite.

Ionic compounds make-up not exist as individual molecules; a formula section thus indicates the lowest reduced ratio of ions in the compound.

A chemical formula shows the kinds and numbers of atoms in the smallest representative unit of a substance.

In mineralogy, as minerals are almost exclusively either ionic or network solids, the formula unit is used. The number of formula units Z and the dimensions of the crystallographic axes are used in build the unit cell.